package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrdersMapper;
import com.itheima.reggie.service.*;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrderService {

    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private OrderDetailService orderDetailService;

    /**
     * 用户下单
     * @param orders
     * @return
     */
    @Override
    @Transactional
    public void submit(Orders orders)
    {
        // 获取当前用户id
        Long userId = BaseContext.getCurrentId();
        // 查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> queryWrapper1 = new LambdaQueryWrapper<>();
        queryWrapper1.eq(ShoppingCart::getUserId, userId);
        List<ShoppingCart> shoppingCartList = shoppingCartService.list(queryWrapper1);

        if(shoppingCartList == null || shoppingCartList.size() == 0){
            throw new CustomException("购物车为空, 无法下单");
        }
        // 查询用户数据
        User user = userService.getById(userId);
        // 查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if(addressBook == null){
            throw new CustomException("地址信息有误, 不能下单");
        }
        // 向订单表插入数据
        Long idNumber = IdWorker.getId();
        AtomicInteger amount = new AtomicInteger(0);
        List<OrderDetail> orderDetailList = shoppingCartList.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(item, orderDetail);
            orderDetail.setOrderId(idNumber);
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;

        }).collect(Collectors.toList());
        orders.setId(idNumber);
        orders.setNumber(String.valueOf(idNumber));
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userId);
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        this.save(orders);
        Long ordersId = orders.getId();
        // 向用户明细表插入数据
        orderDetailService.saveBatch(orderDetailList);
        // 清空购物车数据
        LambdaQueryWrapper<ShoppingCart> queryWrapper2 = new LambdaQueryWrapper<>();
        queryWrapper2.eq(ShoppingCart::getUserId, userId);
        shoppingCartService.remove(queryWrapper2);
    }

}
